General Description

The LD7660J integrated a 600V power MOSFET and a

current mode PWM controller in a DIP-8 package. It’s

operating at fixed frequency of 65 kHz. It provides important

functions needed for a low output power applications such

as leading-edge blanking of the current sensing, internal

slope compensation, and green-mode power-saving

operation under light load or no load condition. This highly

integrated device provides the users a high efficiency, low

external component counts, and low cost solution for low

power adaptor or charger applications.

The special green-mode control is not only to achieve the

low power consumption but also to offer a non-audible-noise

operation when the LD7660J is operating under light load or

no load condition.

Features

z Built-in 600V/1A Power MOSFET

z Secondary-side/Primary-side feedback control

z Switching Frequency at 65KHz

z Fixed Internal Frequency Trembling

z Built-in Load Regulation Compensation

z Built-in Slope Compensation with 75% max duty-cycle

z Low Startup Current (<20μA)

z Current Mode Control with Cycle-by-Cycle Current

Limit

z Non-audible-noise Green Mode Control

z UVLO (Under Voltage Lockout)

z LEB (Leading-Edge Blanking) on CS Pin

z OVP (Over Voltage Protection) on Vcc

z OLP (Over Load Protection)

Applications

z Switching AC/DC Adaptor

z LCD TV or PC Standby Power